n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1680 |
6 | 27342 |
7 | 208302 |
8 | 1099602 |
9 | 4636072 |
10 | 16734438 |
11 | 53810484 |
12 | 158053119 |
13 | 431305959 |
14 | 1106791524 |
15 | 2694914978 |
16 | 6269281305 |
17 | 14010246285 |
18 | 30208869495 |
19 | 63074014815 |
20 | 127909521180 |
21 | 252581107180 |
22 | 486738385140 |
[0,0,0,0,0,1680,27342,208302,1099602,4636072, 16734438,53810484,158053119,431305959,1106791524, 2694914978,6269281305,14010246285,30208869495, 63074014815,127909521180,252581107180, 486738385140] |